sort-array-by-parity py3

0941_sort-array-by-parity/README.md

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+Given an integer array `nums`, move all the even integers at the beginning of the array followed by all the odd integers.
+
+Return _**any array** that satisfies this condition_.
+
+**Example 1:**
+
+    Input: nums = [3,1,2,4]
+    Output: [2,4,3,1]
+    Explanation: The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted.
+    
+
+**Example 2:**
+
+    Input: nums = [0]
+    Output: [0]
+    
+
+**Constraints:**
+
+*   `1 <= nums.length <= 5000`
+*   `0 <= nums[i] <= 5000`
+
+https://leetcode.com/problems/sort-array-by-parity

0941_sort-array-by-parity/python3/solution.py

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+class Solution:
+    def sortArrayByParity(self, nums: List[int]) -> List[int]:
+        ins_pos, next_pos = 0, 0
+        
+        while ins_pos < len(nums) and next_pos < len(nums):
+            if nums[ins_pos] & 1 == 0:
+                ins_pos += 1
+                next_pos = ins_pos
+                continue
+            
+            if nums[next_pos] & 1 == 0:
+                nums[ins_pos], nums[next_pos] = nums[next_pos], nums[ins_pos]
+                ins_pos += 1
+                
+            next_pos += 1
+        
+        return nums